Improvement in pump-plungers



J. KNOUSEf Pump-P1unger.

entedJ-an. 8, 1878.

WITNE SES M sw m Y I ATTORNEYS is pressed outward UNITED STATES PATENTOFFICE.

JOHN KNOIISE, OF HARRISBURG, PENN SYLVANIAf IMPROVEMENT INPUMP-PLUNGERS.

Specification forming part of Letters Patent No. 199,074, dated January8, 1878; application filed November 20, 1877.

- To all whom it may concern:

Be it known that I, J OHN KNOUSE, of Harrisburg, in the county ofDauphin, and in the State of Pennsylvania, have invented certain new anduseful Improvements in Pumps; and do hereby declare that the followingis a full, clear, and exact description thereof, reference being had tothe accompanying drawings, and to the letters of reference markedthereon, making a part of this specification.

The nature of my invention consists inthe construction and arrangementof a pumpplmlilger, as will be hereinafter more fully set ort In orderto enable others skilled in the art to which inven-tiouappertains tomake and use the same, I will now proceed to describe its. constructionand operation, referring to the annexed drawings, in which- Figure l isa side elevation of my improved pump-plunger. Fig. 2 is a centralvertical section of the same; and Fig. 3 is a horizontal section on theline as m, Fig. 1.

The body of my pump-plunger is composed of a circular bottom piece, A,with a cage, B, on top thereof, said cage being either formed with orattached to the bottom A.

Ordinarily, in pump-plungers, the packing is composed of a cup ofleather or other similar material, which soon wears out, and is alsoliable to curl or bend at the edges, and thus render the plunger hard towork up and down. In place of such leather cup, I use a metallic cupmade in two parts, 0 O, the ends of which overlap each other, and arepivoted at their lower edges to the body of the plunger, immediatelyabove the bottom piece A. Each part or half of the metallic cup thusformed at the top by a separate and independent spring, D, as shown inFig. 2. p This cup will not wear out so fast, nor is it liable to bendor curl at the edges, and being made in two parts, with separate andindependent springs acting on them, it will accommodate itself to thepump-cylinder, as well as to any possible deviation from a vertical linein its up-and-down movement.

E is an ordinary flap-valve, covering the opening in the bottom piece A.

Through the center of the cage B is passed a screw-rod, G, formed with ahook, G, at its upper end. This rod may extend downward any suitabledistance, and is held by nuts a a, as shown.

Within the cup 0 O, at the lower end, suitable packing a. may beintroduced, to make water-tight joint at that point.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. A pump-plunger provided with a metallic cup, made in two parts,overlapping each other. and pivoted at their lower ends, and provided atthe inside with separate and independent springs, substantially asherein set forth.

2. The combination of the plunger-body A B, the cups 0 0, made in twoparts and pivoted at their lower ends, the springs D D, packing b, androd G, all substantially as and for the purposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this20th day of November, 1877'.

JOHN KN OUSE. Witnesses:

FRANK GALT, H. AUBREY TOULMIN.

